Improvement in sewing-machines



3 Sheets-Sheet L- A. DESTOUY.

Sewing Machine.

No. 34,413. Patented Feb. 18. 1362.

3 Sheets-Sheet 2. A. DESTOUY.

Sewing Machine.

Patented Feb; 18. 1862.

3 Sheets-Sheet 3.

i A. DESTOUY.

, Sewing Machine;

Patented Feb-18, 1862* UNITE STATES ATE-NT ()FFICE.

AUGUSTUS DESTOUY,

on NEW YORK,- n.- Y.

IMPROVEMENT IN SEWING-MAOHIN ES.

Specification forming part'of Letters Pa-tent No. 34,4! 3, dated Feb ri'mry 18,1862.

and usefulimprovements i'n machinery for sew-' mgboots orshoes and otherlike articles made of leather or other similar substances; and vI hereby declarethe following to be afull,'clear, and exact description of the same, reference being had to the accompanying drawings, in which- Fignre 1 of Sheet 1 is a side elevation of my machine, representing the base-plate upon which it is mounted in section. Fig. 2 is a front elevation, and Fig. 3 asectional elevation, of the machine. Figs. 4, 5,6, 7, 8, 9, 10,

and'll are detail views; and Fig. 12, a double machine, arranged for the uniting of soles with their uppers, as well as for the seiviugof other kind of work in shoe-makin g, saddlery, 850.

In Sheet No. 2, Figs. 1, 2, 3, 4,, 5, and 6 represent respectively side, front, and rear elevations, plan and detail views, of a machine constructed according to the principle of my invention, but modified so as to be adapted to the sewing or stitching of such parts of articles made of leather, 850., which require the work to be laid on a sewing-table while being fed across the sewing mechanism; and my invention consists in the combination, in a' machine provided with a; table or support for the materlal't-o be sewed upon, and with a suitable feeding and thread-controlling device, of the following elements constituting a sewing mechanism: first, an owl and a forked needle, the former for piercing the material and the latter for carrying the under thread through it; second, a stationary thread-case for holding the upper thread, of such form as to allow of the loop formed of the under thread'to pass over and around it; third, a rotary hook to seize and carry the undenthreadloop over and around the case, so as to lock'in the thread fed out from the said thread-case. I

To enable others skilled in the-arts to make and use this myimprovement, I shall now pro ceed to describe its construction and operation.

The frame of the machine ishere shown cast in one piece with a base-plate, A, capable of rotation on a pivot-sleeve, B, and consisting, first, of an upright round disk, 0, through the center of which passes the axleD of the main cog 'whecl E. that receives its motion from the prime mover through thepinion F, fast on the head of the main shaft G, and imparts it to the operative parts of the machine; second, of a standard-casing, c, in front of the disk, that incloses. the sewing and feeding mechanism proper.

To the front part of th'e'frame-work are at tached two brackets, f and g, fitted with bearings to hold the axle h in such a manner as to allow of its reciprocating play in the direction of its length and of its revolution around its axis. One'of the brackets (and preferably the one toward the leftof the operatorlis provided with the support t, for the-material to be sewed to rest upon whi e itis being sewed, and the guard j, whose function it is to prevent the awl from being bent or broken and to give asupport to the upperwhile it is being united with the welt and the sole. The supporthereshown is peculiarlyadapted to the sewing of soles; and it consists 'of twobars slightly curved on top, leaving an intermediate space between them, which is wide enough to allow of the awl, after itshall have penetrated the materials to be sewed, to slide sidewisowithin the two bars a'distance equal 'to the length of the stitches. At the outer end of the support I provide a hook, it, for attachment to it of the end of the under thread,-and it is so arranged in relation to the slot in the support that the thread, when brought under proper tension, shall cross within the slot the path of the forked needle. The sewing mechanismproperconsists ofth'e following three principal moving parts, viz:

First, the awl H-a piercing-instrument, curved concentrically with the shaft h, upon which it is mounted by means of the lever I, Thislever and awl are actuated from the main cog wheel .or disk by means of a rod connected therewith eccentricallyv at J, its other end being provided with a transverse pin "having play within the curved slot in the end of the lever, so that when rotary motion is given to the disk-wheelE the pin l on the connectingrod will first lodge in the extreme recess in the rear of the curved slot of the lever and carry the lever end backward, and thereby cause the awl to penetrate the material to be sewed. At this moment, and while in the leather, the awl is chused to travel side-wise, being actuated by a feed-bar which constitutes part of the feeding mechanism, of which mention willhereinafter be made.- 1')uring this lateral motion the connectiugrod is'pnshed forward, its pin advancing in the slot. of the lever, without, however, imparting motion'to it until it reaches the'fro-nt end of the slot,

when, by its further forward motion, it causes Second, the forked needle Ka penetrating,

though not piercing, instrument. It is arranged for action in conjunction with the awl' on the opposite side thereof relatively to the support. It is operated by the connecting-rod L in the same manneras the awl-lever. Its motions, however, are vibratory in one and the same plane. The pointot' the needle is forked in such a manner as to seize within its recess the under thread, or the thread fed from the bobbin M, when stretched across the opening.

dle, so that thethread' carried through the.

material to be sewed is seized by it and, in the form of a'loop carried over and around the thread-case.

Besides these parts, which constitute the principal elements'of the sewing mechanism,

there a re ath read-case and-a feedin gaud threadeonlrolli'ng device, of which I shall now proceed to give a detailed description.

The thread-case is composed of two shells, qr, hinged together, and open atone side, so that the spool the case isintended to contain may at any time -be seen. One of the shells is perforated for the passage of th'ethr'ead.

The case is held loosely in position by meansv of two side cups, the one slightlypressi ngthe case against theoth er. The second on pis'ren dcred adjustable by means of the-bar working in the bracketato which it. is securely fixed by means of the-set-screw s.'-' The thread, when taken offthe forked needle, is carried over and around the lenticuhu' case bypassing between itsholdihg-cups.

The feeding mechanism may vary according to the kindof work, and to conform'with. thegeneral arrangement of the machine. ln'this machine it is similar to what is known as the ,needle-fecdj? and may be:ternied, in connection with the machine, the awl-feed. To the shalt carrying the gear-wheel m is attached a ca1n-tlis-li';Z, located within the front part'of the standartbframe. This cam-disk is constructed to actuate the short end of the feed bnr, and thercbycanse the said her to vibrate on the pivot 1.: The lowerjendof the feedbar is shaped into'aforl; whicheinbraces the rock-.

ing shaft upon which asaxisflhe awl'and the needle rotate. A spring, a, is provided to bear the short end of the feed-bar against the camdisk, and a set-screw, v, located in a suitable position, is arranged to limit the stroke o the feed-bar. By turning, therefore, the main cogwh'eel E, rotary motion will be imparted to'the cam-disk, which in. its turnwill vibrate the feed-bar between the limits determined by the position of the cam -disk and that of the setscrew. 'By turning the setrscrewj to the right' or left it may be madeto project moreor less, and thereby give the bar more or less vibratory travel. =.The.forked end of the feed-bar bearing against the side of theawl-socket, which being free to slide laterally upon its axis,-

it will be seen that the motion of the forked end is transmitted to the awl. being timed to actuate the feed-bar when the awl shall have penetratedthe material tobe sewed,it will be understood. that the material is dragged sidewise a distance determined by thelength of the stitch'ea' The lateral move ment of the awl is determined, first, by the stop or set-screw, which fixes the iimitof its back-stroke; second, by the cam-disk, which causes it to advance, and when at its extreme stroke to remain stationary until the forkyzheedle, which is now directly, oppositethe W1, shall have come up to the material. ,As the fork-needle advances the awl recedes, and thereby allows the fork-needle, with its thread, to come up through the hole punched by the awl. The threadon thefork-needle forms anopen loop, which is caught by the rotary hook lithe moment the needle shall have reached the extr'eme end of its upward and forward motion. The loop thus caught by the rotary hookis distended and bulged bybeing brought into con-' tact with the curved surface of the lenticular case. The loop,by being thrown over the stationary thread-ease, imprisons andtakes up the loose .t-h'read supplied by the said threadcase, and'is locked'by the ,under-thread'loop being drawn up in the following manner: The under thread, "which is wound over a large bobbin,-M, is properly eonveyed'over a system of pulleys or other guiding devices to the eye W in the end of the lever L. The operationof the parts'is such as that the'eye, with its lever, occupies the extreme position in rear when .the loop is cast oh the thread-case; 'At this moment" the lever advances, and hyso doing draws on theloose thread of the disengaged loop and tak'esupjthe slack. To better insure this action, and to prevent the friction of the thread in the. material from overcoming the tensionof the thread derived from the bobbin, and whereby, instead offtaking up. the

slack,.it would draw more. thread from the bobbimlprovide for giving-the bobbin. in}

creased friction during the time the a-wl-lever is e'ngaged in drawing up the slack thread. This I effect by the employment of an internal friction b-rake, (shown in Figsui and 5,) and 0p- .erated from the outside by means of alatchor its equivalent. "The friction device-eonsist's-iu two hinged clamps, m, clasping the shaft or The eamdisk sleeve fast on said shaft when expanded by a wedge driven or pushed in from the outside.

In the accompanying drawings the wedge ismachine, or asewing-rnachine constructed" accordingto my invention, but difi'erentlyarranged, so as to adapt'itself to stitching, &c.

'In theseveral figures in Plate 2'is represented a machine modified as last hereinbefore mentioned. I Thestationary thread-case, with its rotary carrier, is located underneath the table: lhe hook is fixed upon'a hollows'naft which is mounted androtates on the cup-spindle. The middle gear-wheel, b, transmitsthe movements to the upper and lower gear-wheels,

, a and 0, which operate respectively the needlebar and the rotary hook and feed-wheeL- The latter is actuated by a vibrating lever, d, whose motions are derived from an eccentric, 6, fast on the hook-shaft.

The two machines may be mounted 1nv one frame and upon oneplate, and movement may be transmitted to either from one pinion.

, Having'thue described my invention, Ishall state my claim as follows:

In a machine provided with a table or support for the material to be sewed to rest upon, and a feeding and thread-controlling device, the combination ot'thefollowing elements constituting a sewing mechanism adapted to the manufacture of boots and other like articles, viz: an a wl and a forked needle, the former for piercing the material and the latter to carry the under thread through, and a stationary thread-case and a rotating hook, the former for holding the upper thread and the latter to seize and carry the under-thread loop over and around the thread-case, so as to lock in the thread fed out from said case, the whole being arranged, substantially as described, to operate in the manner and for the purposesfset forth.

In testimony whereof I have signed my name to this specification before two subscribing witnesses.

DESTOUY.

Witnesses A. POLLAK,

EDM. F. BROWN. 

